From mboxrd@z Thu Jan 1 00:00:00 1970 From: Martin Pool Date: Wed, 14 May 2003 02:14:21 +0000 Subject: Re: [Linux-ia64] Dump driver module Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org On 13 May 2003, Bruno Vidal wrote: > Hi > Sorry, but LKCD is really not usefull because it use the buffer > to write on the device. So it just hang in case of data page fault for > example (because interuption are masked), LKCD is also not working in case > of buffer corruption, disk driver pb, etc.... so LKCD is not usable in > lot's of case (and it happen really often to have data page fault). There is also the netconsole/netdump system. This is supposed to rely on only a very minimal network driver. As you say, writing to disk when kernel memory may have been corrupted is a risky business, not only because you might hang but also because you might write over the wrong region. netdump doesn't do any disk IO for that reason. I seem to recall that Linus liked this property. Of course it's only useful if the machine is on a network where there is another machine to catch the data, but I would expect that to be the case for most ia64 machines. http://www.redhat.com/support/wpapers/redhat/netdump/ -- Martin